Knowing that POTUS cares so much about ratings, Stephen recruited a renowned crowd measurement expert to help calculate the size of the show's audience.

As former White House Press Secretary Sean Spicer entered the room, Veep star Anna Chlumsky had one of the night's biggest reactions.

Don't miss the full clip to see other notable reactions—including one from Melissa McCarthy, who won an Emmy this year as Outstanding Guest Actress in a Comedy Series—thanks in part to her portrayal as Spicer on Saturday Night Live.